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MIC5325
(Rev.:2008)

Low VIN/VOUT 400mA ULDO™ with Ultra-Low IQ

Micrel 

MIC5325

Low VIN/VOUT 400mA ULDO™

with Ultra-Low IQ

General Description

The MIC5325 is a high performance, µCap low dropout

regulator, offering ultra-low operating current while

maintaining very fast transient response. The MIC5325

can source up to 400mA of output current and allows a low

input supply voltage source to increase system efficiency.

Ideal for battery operated applications; the MIC5325 offers

high accuracy, extremely low dropout voltage, and low

ground current at all load conditions. The MIC5325 can

also be put into a zero-off-mode current state, drawing

virtually no current when disabled.

The MIC5325 is available in fixed output voltages in the

6-pin 2mm x 2mm Thin MLF® leadless package.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Wide input voltage range: 1.7V to 5.5V

• Stable with 1µF ceramic output capacitor

• Ultra-low dropout voltage ULDO™ 110mV @ 400mA

• ±2% voltage accuracy over temperature

• Bias supply voltage range: 2.5V to 5.5V

• Adjustable output voltage range: 0.8V to 2.0V

• Ultra-low ground current 35µA typical

• 400mA maximum output current per LDO

• Very fast transient response

• Thermal shutdown and current limit protection

• Tiny 6-pin 2mm x 2mm Thin MLF® package

Applications

• Low power handheld devices

• Portable electronics

• GPS receivers

• Post regulator

___________________________________________________________________________________________________________

Typical Application

Li-ion

2.7...4.2V

MIC23050

High Efficiency

DC-to-DC

Buck

CBIAS

CIN

1µF 1µF

MIC5325-xxYMT

VBIAS

VIN

VOUT

EN

GND

BYP

CBYP

10nF

COUT

1µF

ULDO is a trademark of Micrel, Inc

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

April 2008

M9999-040308-A

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